Water quality in Fallon, Montana
Fallon is in Prairie County. 7 active public water systems serve the county; 6 had an EPA violation in the past three years.
No active community water systems are recorded for Prairie County. Homes there are likely on private wells or served from a neighbouring county. See the county page for non-community systems.
Non-community systems in Prairie County (7: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Fallon Water Well Association Fallon |
47 | 3 | 1 | |
|
Terry High School District NO 5 Terry |
133 | 3 | 0 | |
|
Terry Downtown Wua Terry |
115 | 2 | 0 | |
|
Diamond Motel and Campground LLC Terry |
40 | 2 | 0 | |
|
Bolin Elementary School Dist 5 Terry |
45 | 5 | 0 | |
|
M & D Sprinklers Terry |
41 | 0 | 0 | |
|
Prairie Community Hospital Terry |
80 | 2 | 0 |
About this data
Water systems are matched to Prairie County, nearest to Fallon first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Montana records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.